Summoners War Relic Upgrade Guide: How to Reach +12 Efficiency

In Summoners War, the journey to +12 on your Relics—often referred to as Artifacts—is one of the most resource-intensive bottlenecks in the late-game experience. Unlike runes, which follow a more predictable power-up path, pushing these items to their maximum potential requires a disciplined approach to mana management and a realistic understanding of RNG. This guide provides the expert framework needed to maximize your success rates while protecting your account's long-term economic stability.

The Reality of the +12 Upgrade Cycle

The climb to +12 is defined by a non-linear difficulty curve. While early levels are relatively inexpensive and have high success rates, the final push—specifically from +9 to +12—features a sharp drop in probability.

Many players fall into the trap of viewing the upgrade button as a guaranteed progress bar. In reality, Summoners War treats each upgrade attempt as an independent event. Every time you click "Enhance," the game generates a result based on the hidden success percentage for that specific level. Understanding that failure is a statistical certainty rather than bad luck is the first step toward effective resource management.

Strategic Resource Allocation

Before initiating any upgrade session, you must establish a "Safety Floor." Never attempt to push a Relic to +12 if your mana reserves are hovering near zero.

Mana Bank: Keep a reserve of at least 2–3 million mana specifically for enhancement sessions.
Material Stockpiling: Do not start an upgrade session if you are short on Enhancement Stones. Farming these should be a scheduled part of your weekly routine, not an afterthought when you decide to upgrade gear.
The "Stop-Loss" Rule: If you fail three consecutive attempts at +10 or +11, walk away. This prevents the emotional frustration that leads to impulsive, wasteful spending.

Mitigating RNG and the Sunk Cost Fallacy

The most common mistake in Summoners War is the "sunk cost fallacy." This occurs when a player feels that because they have already spent 500,000 mana on a single artifact, they must finish it to +12 to "justify" the cost.

This is mathematically unsound. If an artifact is failing repeatedly, the odds of success on the next click remain exactly the same as they were on the first. If you find yourself stuck at +10, ask yourself if the marginal stat gain of +11 or +12 is worth the potential cost of another million mana. Often, a +10 artifact is more than sufficient for competitive play in Siege or RTA, allowing you to reallocate those funds into rune sets that provide much higher overall account power.

How to Prioritize Your Upgrades

Not all Relics deserve the +12 treatment. Because resources are finite, you must be surgical in your selection. Follow this priority list when deciding which items to push:

Core RTA Monsters: If a monster is a staple of your primary team, it deserves a +12 Relic. The extra stats here can be the difference between a successful turn-one cleave and a failed encounter.
High-Efficiency Artifacts: Only invest in artifacts with optimal "main" stats and at least two high-roll substats. Do not waste mana on "placeholder" artifacts.
Support vs. Damage Dealers: Damage dealers gain more from +12 artifacts due to the impact of "Additional Damage" stats. Support monsters are often perfectly functional at +9.

Expert Strategies for Sustainable Growth

To maintain momentum in Summoners War, you must treat artifact enhancement as a long-term investment rather than a sprint.

Session-Based Upgrading: Dedicate specific days to upgrade sessions. By batching your upgrades, you can track your total mana expenditure more effectively.
The "One-Attempt" Method: If you are low on resources, limit yourself to one attempt per day on your most important artifact. This reduces the risk of burning your entire supply in a single, unlucky hour.
External Factors: Always ensure your Guild bonuses and building upgrades are maxed. While they don't directly affect the +12 success rate, they optimize the mana income you need to fuel these upgrades.

Balancing Artifacts with Rune Progression

A common pitfall for intermediate players is over-investing in artifacts while neglecting their core rune sets. A +12 artifact will not save a monster that lacks the necessary speed or efficiency from its rune set.

Before committing to a +12 push, look at your monster’s overall build. If your runes are still missing crucial speed substats or lack proper synergy, prioritize farming dungeons for better runes instead. Artifacts are intended to be the "finishing touch" on a well-built monster, not a substitute for poor rune quality.

Conclusion: Patience is a Mechanic

In Summoners War, the game is as much about managing your resources as it is about turn-based combat. Successfully reaching +12 on your priority Relics requires the discipline to stop when the odds are against you and the wisdom to recognize which items truly warrant the investment. By following these strategies, you will avoid the frustration of empty mana pools and ensure that your monsters remain competitive at the highest levels of play. Remember: the goal is steady, sustainable growth, not a quick gamble that leaves your account depleted.